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【正文】 Capability Ratio (Cp, CPL, CPU, Cpk) ?Formulas for puting calculations of StDev(Within) – Capability Standard Deviation Note: Because the average moving range is used to estimate StDev(Within), the order of the data is critical因?yàn)橐苿?dòng)極差平均值用來(lái)估計(jì)標(biāo)準(zhǔn)差，所以數(shù)據(jù)的順序非常的關(guān)鍵 )1(21??????nxxRMniii1 2 I T H I NRMs ?Average Moving Range : Capability Sigma : For subgroup size = 1 ? ?nXM INXM A XnRRMniijijni??????? 1)1)((2W IT H IN dRMs ?Average Moving Range : i=index of the subgroup j=number of observation in the ith subgroup Capability Sigma : For subgroup size 1 63 SPS0159EN V01 Kaizen Report Template ?Minitab calculates Performance Ratios (Ppk, Pp) by dividing by StDev(Overall): ?The Total Standard Deviation or StDev(Overall) is calculated as: ?Minitab approximates the dispersion parameter, StDev(Overall) by calculating the standard deviation and dividing by the appropriate bias correction factor, c4*: Minitab: Performance Ratio (Pp, PPL, PPU, Ppk) 4OVE R AL Lssc?Note: Order of the data has no impact on the calculation of StDev(Overall). Performance Ratios are used for unpredictable 整體標(biāo)準(zhǔn)差沒(méi)有影響。性能指數(shù)是用來(lái)評(píng)估不可預(yù)測(cè)的的工藝過(guò)程的。 1)(12?????nxxsniO VE RA LL OVE RA LLsLSLUSLPp6??OVE RAL LsxUSLPPU3??OVERAL LsxPPL ? ? ?PPUPPLMinPpk 。?64 SPS0159EN V01 Kaizen Report Template 分布 控制圖代號(hào) 控制圖名稱 控制圖界限 備注U C LX= X + A2RU C LR=D4RL C LR=D3RU C LX= X + A3SU C LS=B4SL C LS=B3SU C LX= X + m3A2RU C LR=D4RL C LR=D3RU C LX= X + 2 . 6 6 RSU C LRS= 3 . 2 6 7 RSL C LRS=P 不合格品率控制圖 U C LP= P + 3 s q r P ( 1 P ) / nnp 不合格品數(shù)控制圖 U C Lnp= n p + 3 s q r n p ( 1 p )u 單位缺陷數(shù)控制圖 U C Lu= u + 3 s q r u / nc 缺陷數(shù)控制圖 U C Lc= c + 3 s q r c常見(jiàn)控制圖 均值極差控制圖均值 標(biāo)準(zhǔn)差控制圖中位數(shù) 極差控制圖正態(tài)分布（計(jì)量值）二項(xiàng)分布( 計(jì)件值)泊松分布( 計(jì)點(diǎn)值)1. 正態(tài)分布的參數(shù) μ與 σ 互相獨(dú)立 , 控制正態(tài)分布需要分別控制 μ 與 σ , 故正態(tài)分布控制圖都有兩張控制圖 , 前者控制 μ , 后者控制 σ . 二項(xiàng)分布與泊松分布則并非如此 . 2 . X R 圖可由 X S圖替代 . 3 . X R 圖可淘汰 . 4 . 故只剩下 X S 與X RS圖 .左列兩圖可由通用不合格品數(shù)n pT圖代替1. 缺陷數(shù)現(xiàn)改稱為 “ 不合格數(shù) .2. 左列兩圖可由通用缺陷數(shù) CT圖代替。單值 移動(dòng)極差控制圖X RX SX RX RS65 SPS0159EN V01 Kaizen Report Template 謝謝觀看 /歡迎下載 BY FAITH I MEAN A VISION OF GOOD ONE CHERISHES AND THE ENTHUSIASM THAT PUSHES ONE TO SEEK ITS FULFILLMENT REGARDLESS OF OBSTACLES. BY FAITH I BY FAITH
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